decoding into class.py

from typing import Optional, List, Any
from marshmallow import Schema, fields, pprint

class Structure(object):

    _fields = []

    def _init_arg(self, expected_type, value):
        if isinstance(value, expected_type):
            return value
        else:
            return expected_type(**value)

    def __init__(self, **kwargs):
        field_names, field_types = zip(*self._fields)
        for name, field_type in self._fields:
            setattr(self, name, self._init_arg(field_type, kwargs.pop(name)))

        # Check for any remaining unknown arguments
        if kwargs:
            raise TypeError(
                'Invalid arguments(s): {}'.format(','.join(kwargs)))


class BiographyWithEntities:
    raw_text: Optional[str]
    entities: Optional[List[Any]]

    def __init__(self, raw_text: Optional[str], entities: Optional[List[Any]]) -> None:
        self.raw_text = raw_text
        self.entities = entities


class HDProfilePicURLInfo:
    url: str
    width: int
    height: int

    def __init__(self, url: str, width: int, height: int) -> None:
        self.url = url
        self.width = width
        self.height = height


class ProfileContextLinksWithUserID(Structure):

    _fields = [("start", int), ("end", int), ("username", str)]


class User(Structure):
    _fields = [('pk', int),
               ('username', str),
               ('full_name', str),
               ('is_private', bool),
               ('profile_pic_url', str),
               ('profile_pic_id', str),
               ('is_verified', bool),
               ('has_anonymous_profile_picture', bool),
               ('media_count', int),
               ('geo_media_count', int),
               ('follower_count', int),
               ('following_count', int),
               ('following_tag_count', int),
               ('biography', str),
               ('biography_with_entities', BiographyWithEntities),
               ('external_url', str),
               ('total_igtv_videos', int),
               ('usertags_count', int),
               ('is_favorite', bool),
               ('is_favorite_for_stories', bool),
               ('live_subscription_status', str),
               ('has_recommend_accounts', bool),
               ('has_chaining', bool),
               ('hd_profile_pic_url_info', HDProfilePicURLInfo),
               ('mutual_followers_count', int),
               ('profile_context', str),
               ('profile_context_links_with_user_ids',
                list),
               ('profile_context_mutual_follow_ids', list),
               ('is_business', bool),
               ('account_type', int),
               ('is_call_to_action_enabled', object),
               ('can_see_primary_country_in_settings', bool)]